[Qingdao]

Change oil based on age; change filter based on mileage. Thats my $.02.

2k miles that filter hasn't filtered anything, but the oil has degraded some.

I change the oil on my bike every year before winter storage regardless of mileage. And then I change it after about 1000 miles of ride time in the spring. I change the filter on the bike every 4000 miles (Honda recommended interval). All my other engines (except the lawnmower) get run year round. I guess that puts me in the change the oil side of the argument.